Add 21/7 and 42/10
1st number: 3 0/7, 2nd number: 4 2/10
21/7 + 42/10 is 36/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,
21/7 = 21 × 10/7 × 10 = 210/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
42/10 = 42 × 7/10 × 7 = 294/70 - Add the two like fractions:
210/70 + 294/70 = 210 + 294/70 = 504/70 - 504/70 simplified gives 36/5
- So, 21/7 + 42/10 = 36/5
In mixed form: 71/5
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